Issue #2367835 by rpayanm, andypost: Fixed FormBuilderTest namespace.
Issue #2361747 by rpayanm: Remove truncate_utf8.
Issue #2361837 by rpayanm: Remove drupal_ucfirst.
Issue #2361811 by rpayanm: Remove drupal_strtoupper.
Issue #2367557 by mpdonadio: Fixed Update TestKernel to match class loader changes in Drupal Kernel.